User`s guide

118 Agilent InfiniiVision 2000 X-Series Oscilloscopes User's Guide
9 Triggers
Hex Bus Pattern Trigger
You can specify a bus value on which to trigger. To do this, first define
the bus. See "To display digital channels as a bus" on page 88 for details.
You can trigger on a bus value whether you are displaying the bus or not.
To trigger on a bus value:
1 Press the [Pattern] key on the front panel.
2 Press the Channel softkey and rotate the Entry knob to select Bus1 or
Bus2.
3 Press the Digit softkey and rotate the Entry knob to select a digit of the
selected bus.
4 Press the Hex softkey and rotate the Entry knob to select a value for
the digit.
5 You can use the Set all Digits softkey to set all digits to a particular
value.
When a hex bus digit contains one or more don't care (X) bits and one or
more bit with a value or 0 or 1, the "$" sign will be displayed for the digit.
For information regarding digital bus display when Pattern triggering see
"Bus values are displayed when using Pattern trigger" on page 90.
NOTE
Specifying an Edge in a Pattern
You are allowed to specify only one rising or falling edge term in the pattern. If you define an
edge term, then select a different channel in the pattern and define another edge term, the
previous edge definition is changed to a don't care.
NOTE
If a digit is made up of less than four bits, then the value of the digit will be limited to the
value that can be created by the selected bits.